NieR (alternatively spelled NIER) was Cavia's final game, and an action RPG for the XBox 360/PS3. It is set in the same universe as the Drakengard series, and has some story connections, though these are not confirmed within the game itself.
The Japanese version is known as NieR Gestalt on the 360, and NieR Replicant on the PS3. Gestalt stars a father protecting his daughter, while Replicant is about a brother doing the same for his sister. The games are identical otherwise. Gestalt is the version that the West got on both platforms.
Due to poor marketing by publisher Square-Enix and the game's failure to meet players' expectations of a tarted-up brogamer epic, NieR was a critical and commercial failure in the West, but saw wider recognition in Japan.
(pics./videos would be nice here)